Bug 1121298 - Part 2: Add Constructor(uri) for MozNDEFRecord. r=smaug, dimi

dom/nfc/MozNDEFRecord.cpp

@@ -10,12 +10,11 @@
 #include "mozilla/dom/MozNDEFRecordBinding.h"
 #include "mozilla/HoldDropJSObjects.h"
 #include "nsContentUtils.h"
-
+#include "nsString.h"
 
 namespace mozilla {
 namespace dom {
 
-
 NS_IMPL_CYCLE_COLLECTION_CLASS(MozNDEFRecord)
 
 NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(MozNDEFRecord)
@@ -123,6 +122,28 @@ MozNDEFRecord::Constructor(const GlobalObject& aGlobal,
   return ndefRecord.forget();
 }
 
+/* static */ already_AddRefed<MozNDEFRecord>
+MozNDEFRecord::Constructor(const GlobalObject& aGlobal,
+                           const nsAString& aUri,
+                           ErrorResult& aRv)
+{
+  if (aUri.IsVoid()) {
+    aRv.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);
+    return nullptr;
+  }
+
+  nsCOMPtr<nsPIDOMWindow> win = do_QueryInterface(aGlobal.GetAsSupports());
+  if (!win) {
+    aRv.Throw(NS_ERROR_FAILURE);
+    return nullptr;
+  }
+
+  nsRefPtr<MozNDEFRecord> ndefRecord = new MozNDEFRecord(win, TNF::Well_known);
+  ndefRecord->InitType(aGlobal.Context(), RTD::U);
+  ndefRecord->InitPayload(aGlobal.Context(), aUri);
+  return ndefRecord.forget();
+}
+
 MozNDEFRecord::MozNDEFRecord(nsPIDOMWindow* aWindow, TNF aTnf)
   : mWindow(aWindow) // For GetParentObject()
   , mTnf(aTnf)
@@ -144,6 +165,15 @@ MozNDEFRecord::InitType(JSContext* aCx, const Optional<Uint8Array>& aType)
   IncSize(type.Length());
 }
 
+void
+MozNDEFRecord::InitType(JSContext* aCx, RTD rtd)
+{
+  EnumEntry rtdType = RTDValues::strings[static_cast<uint32_t>(rtd)];
+  mType = Uint8Array::Create(aCx, rtdType.length,
+                             reinterpret_cast<const uint8_t*>(rtdType.value));
+  IncSize(rtdType.length);
+}
+
 void
 MozNDEFRecord::InitId(JSContext* aCx, const Optional<Uint8Array>& aId)
 {
@@ -170,6 +200,23 @@ MozNDEFRecord::InitPayload(JSContext* aCx, const Optional<Uint8Array>& aPayload)
   IncSizeForPayload(payload.Length());
 }
 
+void
+MozNDEFRecord::InitPayload(JSContext* aCx, const nsAString& aUri)
+{
+  using namespace mozilla::dom::WellKnownURIPrefixValues;
+
+  nsCString uri = NS_ConvertUTF16toUTF8(aUri);
+  uint8_t id = GetURIIdentifier(uri);
+  uri = Substring(uri, strings[id].length);
+  mPayload = Uint8Array::Create(aCx, this, uri.Length() + 1);
+
+  JS::AutoCheckCannotGC nogc;
+  uint8_t* data = JS_GetUint8ArrayData(mPayload, nogc);
+  data[0] = id;
+  memcpy(&data[1], reinterpret_cast<const uint8_t*>(uri.Data()), uri.Length());
+  IncSizeForPayload(uri.Length() + 1);
+}
+
 void
 MozNDEFRecord::IncSize(uint32_t aCount)
 {
@@ -186,6 +233,21 @@ MozNDEFRecord::IncSizeForPayload(uint32_t aLen)
   IncSize(aLen);
 }
 
+/* static */ uint32_t
+MozNDEFRecord::GetURIIdentifier(const nsCString& aUri)
+{
+  using namespace mozilla::dom::WellKnownURIPrefixValues;
+
+  // strings[0] is "", so we start from 1.
+  for (uint32_t i = 1; i < static_cast<uint32_t>(WellKnownURIPrefix::EndGuard_); i++) {
+    if (StringBeginsWith(aUri, nsDependentCString(strings[i].value))) {
+      return i;
+    }
+  }
+
+  return 0;
+}
+
 MozNDEFRecord::~MozNDEFRecord()
 {
   DropData();

dom/nfc/MozNDEFRecord.h

@@ -52,6 +52,11 @@ public:
               const MozNDEFRecordOptions& aOptions,
               ErrorResult& aRv);
 
+  static already_AddRefed<MozNDEFRecord>
+  Constructor(const GlobalObject& aGlobal,
+              const nsAString& aURI,
+              ErrorResult& aRv);
+
   TNF Tnf() const
   {
     return mTnf;
@@ -92,13 +97,16 @@ private:
   void HoldData();
   void DropData();
   void InitType(JSContext* aCx, const Optional<Uint8Array>& aType);
+  void InitType(JSContext* aCx, const RTD rtd);
   void InitId(JSContext* aCx, const Optional<Uint8Array>& aId);
   void InitPayload(JSContext* aCx, const Optional<Uint8Array>& aPayload);
+  void InitPayload(JSContext* aCx, const nsAString& aUri);
   void IncSize(uint32_t aCount);
   void IncSizeForPayload(uint32_t aLen);
 
   static bool
   ValidateTNF(const MozNDEFRecordOptions& aOptions, ErrorResult& aRv);
+  static uint32_t GetURIIdentifier(const nsCString& aUri);
 
   TNF mTnf;
   JS::Heap<JSObject*> mType;

dom/webidl/MozNDEFRecord.webidl

@@ -5,6 +5,11 @@
 
 /* Copyright © 2013 Deutsche Telekom, Inc. */
 
+/**
+ * Type Name Format.
+ *
+ * @see NFCForum-TS-NDEF 3.2.6 TNF
+ */
 enum TNF {
   "empty",
   "well-known",
@@ -15,7 +20,62 @@ enum TNF {
   "unchanged"
 };
 
-[Constructor(optional MozNDEFRecordOptions options)]
+/**
+ * Prefixes of well-known URI.
+ *
+ * @see NFCForum-TS-RTD_URI Table 3. Abbreviation Table.
+ */
+enum WellKnownURIPrefix {
+  "",
+  "http://www.",
+  "https://www.",
+  "http://",
+  "https://",
+  "tel:",
+  "mailto:",
+  "ftp://anonymous:anonymous@",
+  "ftp://ftp.",
+  "ftps://",
+  "sftp://",
+  "smb://",
+  "nfs://",
+  "ftp://",
+  "dav://",
+  "news:",
+  "telnet://",
+  "imap:",
+  "rtsp://",
+  "urn:",
+  "pop:",
+  "sip:",
+  "sips:",
+  "tftp:",
+  "btspp://",
+  "btl2cap://",
+  "btgoep://",
+  "tcpobex://",
+  "irdaobex://",
+  "file://",
+  "urn:epc:id:",
+  "urn:epc:tag:",
+  "urn:epc:pat:",
+  "urn:epc:raw:",
+  "urn:epc:",
+  "urn:nfc:"
+};
+
+/**
+ * Record Type Description.
+ *
+ * Record Types from well-known NDEF Records.
+ * @see NFCForum-TS-RTD
+ */
+enum RTD {
+  "U", // URI
+};
+
+[Constructor(optional MozNDEFRecordOptions options),
+ Constructor(DOMString uri)]
 interface MozNDEFRecord
 {
   /**